package com.clstu.wraper;


public class WraperMethod {
    public static void main(String[] args) {
        System.out.println(Integer.MAX_VALUE);//整数最大子和最小值
        System.out.println(Integer.MIN_VALUE);

        System.out.println(Character.isDigit('a'));//包装类的普遍方法，
        System.out.println(Character.isDigit('1'));
        System.out.println(Character.isLetter('a'));
        System.out.println(Character.isLetter('1'));
        System.out.println(Character.isUpperCase('A'));
        System.out.println(Character.isUpperCase('a'));
        System.out.println(Character.isLowerCase('A'));
        System.out.println(Character.isLowerCase('a'));
        System.out.println(Character.toUpperCase('a'));
        System.out.println(Character.toLowerCase('B'));
        System.out.println(Character.toLowerCase('b'));

    }
}
